Abstract:

Along with the fast development of national economy, the traditional iron resources are more and more scarce, it is urgent to seek and to develop nontraditional iron resources. The Nanling ultra poor magnetite can be imputed nontraditional mineral resource with mFe content of 10.20%. Through the contrast analysis on the chemical constitution of the magnetic iron ore and the plagioclaseamphibolite in Nanling ultra poor magnetite, and the analysis of graphs of (Fe+Al+Ti)(Ca+Mg) and (FeO+Fe2O3+TiO2)Al2O3MgO, combining the geological features of mining area and the ore body characteristics, the conclusion can be drawn as follows: the plagioclaseamphibolites including magnetite and the plagioclaseamphibolite in Nanling mining area are formed from the oceanic tholeiite with rich iron after the deteriorating, and their genesis types should be the ultrapoor iron deposit of weathered residual origin. The prospecting indicators have been cleared initially, and the prospecting pattern has also been established,its significant for exploration of mineral deposits such as Nanling.

Key words: ultra poor magnetite, geological characteristic, genesis, prospecting pattern, Songxian, Henan